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graphdb-mcphub-gateway

v1.0.4

Published

MCPHub Gateway for Claude Desktop, supporting Authorization header passthrough.

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Readme

GraphDB MCP Server Gateway

Forked from lightconetech/mcp-gateway

This version adds support for passing an Authorization header to the backend MCP server.
Renamed to graphdb-mcphub-gateway to distinguish GraphDB-specific adaptations.

A gateway service that bridges the stdio-based Model Context Protocol (MCP) implementation in Claude Desktop with HTTP/SSE-based MCP servers. This solves the protocol compatibility gap since Claude Desktop currently only supports stdio-based MCP servers. See the discussion here.

Why This Gateway?

Claude Desktop App currently only supports stdio protocol for MCP servers, while many MCP servers use HTTP with Server-Sent Events (SSE) transport. This gateway acts as a protocol translator, allowing Claude Desktop to communicate with any HTTP/SSE MCP server by:

  1. Accepting stdio input from Claude Desktop
  2. Converting and forwarding requests to HTTP/SSE MCP servers
  3. Converting SSE responses back to stdio format for Claude Desktop

This fork adds support for passing an Authorization header via environment variable, useful for secured backends like GraphDB.

Installation

Install the gateway globally using npm:

npm install -g graphdb-mcphub-gateway

By default, the original gateway connects to the public MCP Hub at https://server.mcphub.ai/api/mcp, which provides access to various pre-configured MCP services.

In this fork, the default endpoint has been changed to http://localhost:7200/mcp, which corresponds to the default GraphDB MCP server URL (assuming GraphDB is running on its default port).

export MCPHUB_SERVER_URL=https://your-secured-mcp-server.com/mcp

Authorization Header for Secured GraphDB MCP Server If the gateway will communicate with a secured GraphDB MCP server, set the following environment variable to pass an authorization token (e.g., Bearer token or API key) via the Authorization header:

export MCPHUB_AUTHORIZATION_HEADER="YOUR_TOKEN_HERE"